839.51% is the change from 81 to 761
Calculation steps:
[( 761 - 81 ) ÷ 81] x 100 = 839.51%
Formula
Percentage change = [(761 - 81) / 81] x 100
Subtract the new number by the original number
761 - 81 = 680
680 ÷ 81 = 8.395061728395062
8.395061728395062 x 100 = 839.51%